Roggensack, who spent part of her day at the Republican campaign center in Waukesha, said her experience makes her the best candidate.

"You know most of my job is spent deciding if another judge properly applied the law," Roggensack said. "I am able to give that question a much more thorough review because I've been a judge for almost 17 years. I've done the work of the other people that I'm judging."

Fallone, a Marquette Law School professor, met with campaign volunteers at the AFL-CIO office on Saturday in Milwaukee. He said the Supreme Court is due for a change.

"Everywhere I go people are very embarrassed of our Supreme Court," Fallone said. "They know we can do better. They come up to me and they say, 'Why can't our court work effectively? What can we do to get it back on track?' And that's why there's so much support for my campaign."

A Mexican photojournalist who left the state he worked in because of threats was among five people found shot to death in a Mexico City apartment this weekend, officials and press freedom advocacy groups said.